Answer:
Now we can calculate the p value with the following probability
If we use the commonly significance level of 0.05 we see that the p value is lower than these values we can conclude that the true mean is different from the value of 465.6 at 5% of significance
Step-by-step explanation:
Data provided
represent the mean score on the standardized memory test
represent the population standard deviation
sample size
represent the value that we want to verify
z would represent the statistic
represent the p value
System of hypothesis
We are interested to check if the memory performance for elderly individuals differs from that of the general population (mean different from 465.6), the system of hypothesis are then:
Null hypothesis:
Alternative hypothesis:
Since we know the population deviation we can use the z statistic from the z test for the true mean:
(1)
Replacing the info given we got:
Now we can calculate the p value with the following probability
If we use the commonly significance level of 0.05 we see that the p value is lower than these values we can conclude that the true mean is different from the value of 465.6 at 5% of significance
Answer:
1. C
2. A
3. B
Step-by-step explanation:
1. because 246 ÷ 300 = 0.82, so it is 0.82 but 82% in percentage
2. because 32 ÷ 96 = 0.333333, but in fraction, it is 33...%
3. because 173 ÷ 480 = 0.36041666666, but rounded up (to the nearest tenth) is 0.36, but then in percentage is 36%
Hope this helped! Pls Brainliest my answer! It would mean and help a lot! ; )
Answer:
x=2.5
Step-by-step explanation:
Just divide 4.75 by 1.9.
Answer: -a dilation followed by a translation
-a dilation followed by a reflection
-a reflection followed by a dilation
-a rotation followed by a dilation
Step-by-step explanation:
A rigid transformation is a kind of transformation which does not affect the size of the shape.They produces congruent images.There are four kinds of rigid motions: 1) translation 2) reflection 3) rotation 4) glide reflection.
On the other hand a dilation is a transformation that creates an image that is the exactly same shape as the original, but have a different size.
Thus dilation does not create congruent images.
Therefore any sequence of transformations which has dilation will not result in an image that is similar and non-congruent to the pre-image.
